import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)


def check(n, v):
    return v if (n * p) // 100 < (n * q) // 100 + a else 0


p, q, a = map(int, readline().split())
print(check(10 ** 9, 10 ** 9 - (10 ** 6 + a)) + sum(check(i, 1) for i in range(1, 10 ** 6 + a + 1)))